Step 4. If the analyzer powers up normally with no error messages (see the following
illustration), the screen is continually updating, but the analyzer does not respond to
key presses, use the following table to determine the probable faulty assembly.
Symptom Probable Faulty Assembly
SYSTEM keys function but MARKER, DISPLAY,
MEASUREMENT, or number keys do not function correctly
A13 or A15 Primary Keypad
MARKER, DISPLAY, MEASUREMENT, and number keys
function but SYSTEM keys do not function correctly
A14 Secondary Keypad
No keys function correctly A11 Keyboard Controller
Troubleshooting the Analyzer Agilent 35670A
To perform initial verification
4-6
